WORD
The bit set to TRUE indicates which error has occurred in which COM port.
Bit 0: COM2 Overrun error
Bit 1: COM2 Framing error
Bit 2: COM2 Parity error
Bit 7: COM2 Overflow error
Bit 8: COM3 Overrun error
Bit 9: COM3 Framing error
Bit A: COM3 Parity error
Bit F: COM3 Overflow error